11.11 points Problem 12-22 Calculating Returns [LO2, 3] Suppose we have the following Treasury bill returns and inflation rates over an eight- year period: Year eBook Treasury bills Inflation Hint Print References 12345678 8.11% 9.83% 8.92 13.36 6.74 7.87 5.88 5.61 6.32 7.63 8.57 10.01 11.55 14.32 13.21 13.77 a. Calculate the average return for Treasury bills and the average annual inflation rate for this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) b. Calculate the standard deviation of Treasury bill returns and inflation over this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) c. What was the average real return for Treasury bills over this period? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a. Treasury bills %